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$113+ Cheap flights from St. Louis (STL) to Mexico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MEX
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from St. Louis to Mexico

Keep the following information in mind while searching for St. Louis to Mexico flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$244
(Cheapflightsfares)

One-way from

$113
(Cheapflightsfares)

Popular in

December

Cheapest in

May

Average price

$576

Good round-trip deal

$288 or less

Good one-way deal

$182 or less
From Lambert-St Louis to Mexico
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One-way flight from Lambert-St Louis to Mexico
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Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Mexico.
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Price to beat on a one-way flight from Lambert-St Louis to Mexico.
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Find flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/2610:22 amSTL - CUN
Nonstop3h 13mFrontier
dom. 11/23:45 pmCUN - STL
Nonstop3h 15mFrontier
Deal found 9/10$244
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/3010:21 amSTL - CUN
Nonstop3h 13mFrontier
vie. 10/32:49 pmCUN - STL
Nonstop3h 21mFrontier
Deal found 9/9$248
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/510:39 amSTL - MEX
1 stop13h 16mMultiple Airlines
sáb. 10/118:10 amMEX - STL
2 stops24h 12mMultiple Airlines
Deal found 9/11$272
This Cheapflightsfares deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/2910:21 amSTL - CUN
Nonstop3h 13mFrontier
mar. 9/302:49 pmCUN - STL
Nonstop3h 21mFrontier
Deal found 9/9$278
This Cheapflightsfares deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/2610:21 amSTL - CUN
Nonstop3h 13mFrontier
mar. 9/302:49 pmCUN - STL
Nonstop3h 21mFrontier
Deal found 9/9$281
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/2410:21 amSTL - CUN
Nonstop3h 13mFrontier
mié. 10/12:49 pmCUN - STL
Nonstop3h 21mFrontier
Deal found 9/9$282
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/410:17 amSTL - CUN
Nonstop3h 13mFrontier
mar. 11/183:45 pmCUN - STL
Nonstop3h 15mFrontier
Deal found 9/11$283
This Cheapflightsfares deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/310:17 amSTL - CUN
Nonstop3h 13mFrontier
vie. 11/143:45 pmCUN - STL
Nonstop3h 15mFrontier
Deal found 9/11$284
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/3010:21 amSTL - CUN
Nonstop3h 13mMultiple Airlines
sáb. 10/49:54 amCUN - STL
1 stop24h 00mMultiple Airlines
Deal found 9/9$285
This Priceline deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/306:00 amSTL - CUN
Nonstop3h 18mFrontier
vie. 12/51:01 pmCUN - STL
Nonstop3h 25mFrontier
Deal found 9/10$287
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/139:59 pmSTL - MEX
1 stop22h 51mMultiple Airlines
mar. 10/217:00 amMEX - STL
2 stops25h 07mMultiple Airlines
Deal found 9/10$287
This Frontier deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/310:17 amSTL - CUN
Nonstop3h 13mFrontier
jue. 11/133:45 pmCUN - STL
Nonstop3h 15mFrontier
Deal found 9/11$289

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Mexico that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from St. Louis to Mexico that are best for you.

Fly from

St. Louis

Fly to

Mexico

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

dom. 10/26

10:22 am-1:35 pm

Nonstop3h 13m

Cancun

dom. 11/2

3:45 pm-6:00 pm

Nonstop3h 15m

$244

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

lun. 10/13

10:22 am-1:35 pm

Nonstop3h 13m

Cancun

sáb. 10/18

1:49 pm-10:02 am

1 stop20h 13m

$312

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

mié. 9/24

4:05 pm-7:40 pm

1 stop27h 35m

Cancun

mié. 10/1

2:49 pm-6:10 pm

Nonstop3h 21m

$315

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

lun. 10/13

9:59 pm-7:50 pm

1 stop22h 51m

Mexico City Benito Juarez

mar. 10/21

8:10 am-9:07 am

1 stop23h 57m

$326

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

mar. 12/2

6:06 pm-12:30 pm

2 stops17h 24m

Cancun

mié. 12/10

4:15 pm-11:28 pm

1 stop8h 13m

$340

St. LouisGuadalajara

STL - GDL

STLGDL

Lambert-St Louis

sáb. 10/25

7:52 pm-3:05 pm

1 stop20h 13m

Guadalajara Miguel Hidal

sáb. 11/1

3:18 pm-12:09 pm

1 stop19h 51m

$352

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

mar. 10/7

10:22 am-1:35 pm

Nonstop3h 13m

Cancun

mar. 10/14

2:50 pm-6:07 pm

Nonstop3h 17m

$360

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

dom. 11/30

6:00 am-10:18 am

Nonstop3h 18m

Cancun

vie. 12/5

1:35 pm-1:53 pm

1 stop25h 18m

$366

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

jue. 10/16

10:17 am-10:55 pm

1 stop13h 38m

Mexico City Benito Juarez

dom. 10/19

8:10 am-9:07 am

1 stop23h 57m

$371

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

sáb. 10/11

7:52 pm-5:00 pm

1 stop22h 08m

Mexico City Benito Juarez

sáb. 10/18

8:10 am-9:22 am

2 stops24h 12m

$378

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to Mexico

Have a flexible travel schedule? Discover the best time to fly to Mexico from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Mexico

What is the cheapest month to book a flight from St. Louis to Mexico?

Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $387). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MX?

Find hourly flight availability from St. Louis to Mexico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

When flying from St. Louis to Mexico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Mexico

Get insights into the airlines that provide service to Mexico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Mexico. Reviews last updated septiembre 11, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from St. Louis to Mexico. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Mexico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Mexico?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.

  • How long is the flight from St. Louis to Mexico?

    Frontier, Delta, and United Airlines can get you from St. Louis to Mexico in just under 3h 13m. Your travel time can differ by up to 14h 11m. The distance between St. Louis and Mexico is about 1241 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to Mexico one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $113. Users have also found prices from $198 and $202 on American Airlines and Southwest, respectively.

  • What are the most popular routes from St. Louis to Mexico?

    The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - Puerto Vallarta Ordaz.

  • Can I find deals for flights from St. Louis to Mexico that include hotel bookings?

    Yes. In addition to deals on St. Louis to Mexico flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Mexico?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico.

  • Can I find deals for business class flights from St. Louis to Mexico?

    Yes. Cheapflights offers flight deals from St. Louis to Mexico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Mexico?

    Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $387). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Mexico

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from St. Louis to Mexico

Discover the top 9 airlines that operate flights from St. Louis to Mexico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$293FlexibilityNo cancel feeOn-time65%
VolarisCheapest$174Average$364FlexibilityNo cancel feeOn-time79%
DeltaCheapest$225Average$579FlexibilityNo cancel feeOn-timeN/A
AeromexicoCheapest$252Average$539FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$258Average$507FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$306Average$592FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$385Average$584FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$408Average$646FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$453Average$696FlexibilityNo cancel feeOn-time63%

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